i have a CONTRACTOR 64 Saw my jig does not fit on the right side of the blade - the guide bar does not fit in the slot. I am able to use the jig on the left side but the push handle are all on the back side and scales do not zero for proper alignment - Is this the correct product for a 64 saw or is it designed for a 66 and e the slots have a different orientation thus the incorrect fit - please help I am very confused and have been unable to cut tenons with this jig. Brad Kittle